This function currently returns a node pointer so there is no way to know the error code. Also it uses data in BSS which seems unnecessary since the caller might prefer to use a local variable.
Update the function and split its body out into a separate function so we can use it later.
Signed-off-by: Simon Glass sjg@chromium.org ---
Changes in v2: - Fix s/u8/void/ in find_uncached() - Fix setting of start in file_cbfs_find_uncached() - Add more comments on @node in file_cbfs_find_uncached()
fs/cbfs/cbfs.c | 48 +++++++++++++++++++++++++++--------------------- include/cbfs.h | 17 +++++++++-------- 2 files changed, 36 insertions(+), 29 deletions(-)
diff --git a/fs/cbfs/cbfs.c b/fs/cbfs/cbfs.c index 91744d0ca48..5b8f7dc451b 100644 --- a/fs/cbfs/cbfs.c +++ b/fs/cbfs/cbfs.c @@ -371,40 +371,46 @@ const struct cbfs_cachenode *file_cbfs_find(const char *name) return cbfs_find_file(&cbfs_s, name); }
-const struct cbfs_cachenode *file_cbfs_find_uncached(ulong end_of_rom, - const char *name) +static int find_uncached(struct cbfs_priv *priv, const char *name, void *start, + struct cbfs_cachenode *node) { - struct cbfs_priv *priv = &cbfs_s; - void *start; - u32 size; - u32 align; - static struct cbfs_cachenode node; - - if (file_cbfs_load_header(priv, end_of_rom)) - return NULL; - - start = priv->start; - size = priv->header.rom_size; - align = priv->header.align; + int size = priv->header.rom_size; + int align = priv->header.align;
while (size >= align) { - int ret; int used; + int ret;
- ret = file_cbfs_next_file(priv, start, size, align, &node, + ret = file_cbfs_next_file(priv, start, size, align, node, &used); if (ret == -ENOENT) break; else if (ret) - return NULL; - if (!strcmp(name, node.name)) - return &node; + return ret; + if (!strcmp(name, node->name)) + return 0;
size -= used; start += used; } - cbfs_s.result = CBFS_FILE_NOT_FOUND; - return NULL; + priv->result = CBFS_FILE_NOT_FOUND; + + return -ENOENT; +} + +int file_cbfs_find_uncached(ulong end_of_rom, const char *name, + struct cbfs_cachenode *node) +{ + struct cbfs_priv priv; + void *start; + int ret; + + ret = file_cbfs_load_header(&priv, end_of_rom); + if (ret) + return ret; + start = priv.start; + + return find_uncached(&priv, name, start, node); }
const char *file_cbfs_name(const struct cbfs_cachenode *file) diff --git a/include/cbfs.h b/include/cbfs.h index bd1dd60648b..29708626b15 100644 --- a/include/cbfs.h +++ b/include/cbfs.h @@ -161,17 +161,18 @@ int cbfs_init_mem(ulong base, ulong size, struct cbfs_priv **privp); /***************************************************************************/
/** - * file_cbfs_find_uncached() - Find a file with a particular name in CBFS - * without using the heap. + * file_cbfs_find_uncached() - Find a file in CBFS given the end of the ROM * - * @end_of_rom: Points to the end of the ROM the CBFS should be read - * from. - * @name: The name to search for. + * Note that @node should be declared by the caller. This design is to avoid + * the need for allocation here. * - * @return A handle to the file, or NULL on error. + * @end_of_rom: Points to the end of the ROM the CBFS should be read from + * @name: The name to search for + * @node: Returns the contents of the node if found (i.e. copied into *node) + * @return 0 on success, -ENOENT if not found, -EFAULT on bad header */ -const struct cbfs_cachenode *file_cbfs_find_uncached(ulong end_of_rom, - const char *name); +int file_cbfs_find_uncached(ulong end_of_rom, const char *name, + struct cbfs_cachenode *node);
/** * file_cbfs_name() - Get the name of a file in CBFS.